12210121205 has 16 divisors (see below), whose sum is σ = 15517401984. Its totient is φ = 9203937600.

The previous prime is 12210121199. The next prime is 12210121229. The reversal of 12210121205 is 50212101221.

It is a de Polignac number, because none of the positive numbers 2^k-12210121205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784646 + ... + 800055.

It is an arithmetic number, because the mean of its divisors is an integer number (969837624).

Almost surely, 2^12210121205 is an apocalyptic number.

It is an amenable number.

12210121205 is a deficient number, since it is larger than the sum of its proper divisors (3307280779).

12210121205 is a wasteful number, since it uses less digits than its factorization.

12210121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584796.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 12210121205 its reverse (50212101221), we get a palindrome (62422222426).

The spelling of 12210121205 in words is "twelve billion, two hundred ten million, one hundred twenty-one thousand, two hundred five".